3D printing PEDOT-CMC-based high areal capacity electrodes for Li-ion batteries

doi:10.1007/s11581-021-04063-4

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	3D printing PEDOT-CMC-based high areal capacity electrodes for Li-ion batteries
	Bao, Pengqiang 1; Lu, Ying 1; Tao, Pan 1; Liu, Bailin 2; Li, Jinlian 1; Cui, Xiaoling 1
刊名	IONICS
	2021
卷号	27 期号:7 页码:2857-2865
关键词	PEDOT 3D printing Thick electrodes Li-ion battery Areal capacity
ISSN号	0947-7047
DOI	10.1007/s11581-021-04063-4
英文摘要	Lithium-ion micro-batteries (LIMBs) with higher energy density have drawn extensive attention. 3D printing technique based on direct ink writing (DIW) is a low-cost and simple approach to fabricate LIMBs especially with higher areal capacity. Herein, poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) nanofibrils are first combined with carbon methyl cellulose (CMC) to achieve the 3D printing of thick LFP (LiFePO4)-PEDOT-CMC electrodes at room temperature by DIW. 3D-printed PEDOT-CMC-based composite thick electrodes demonstrate high conductivity because of the interconnected 3D network including hierarchical macro-micro porous criss-crossing filaments which can provide effective transport paths for Li ions and electrons. Further, LFP-PEDOT-CMC electrodes of different thicknesses are 3D-printed to study the effect of thicknesses on the electrochemical performances. The 3D-printed ultra-thick LFP-CMC-PEDOT electrode of 1.43 mm thickness at lower rate exhibits a highly improved areal capacity (5.63 mAh cm(-2), 0.2 C) and high capacity retention (after 100 cycles, 0.2 C, 92%). The rate capability decreases steadily with the increasing thickness. However, for the extra-thick electrodes greater than 1.43 mm thickness, the discharge capacity, rate, and cycle capability decline dramatically. Electrochemical impedance spectroscopy measurements are used to explain the kinetic mechanism. For 3D-printed LFP-CMC-PEDOT electrodes blow 1.43 mm thickness, the 3D network plays the dominant role to maintain the effective transmission dynamics regardless of electrode thickness. But for the extra-thick electrodes, the greater transport distance becomes the major limiting factor resulting in the degradation of electrochemical performances. This work will offer guidance on how to apply 3D-printed ultra-thick electrodes with high energy density to LIMBs.
WOS研究方向	Chemistry ; Electrochemistry ; Physics
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000641660100002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148251]
专题	石油化工学院
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, 36 Pengjiaping Rd, Lanzhou 730050, Gansu, Peoples R China; 2.Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Bao, Pengqiang,Lu, Ying,Tao, Pan,et al. 3D printing PEDOT-CMC-based high areal capacity electrodes for Li-ion batteries[J]. IONICS,2021,27(7):2857-2865.
APA	Bao, Pengqiang,Lu, Ying,Tao, Pan,Liu, Bailin,Li, Jinlian,&Cui, Xiaoling.(2021).3D printing PEDOT-CMC-based high areal capacity electrodes for Li-ion batteries.IONICS,27(7),2857-2865.
MLA	Bao, Pengqiang,et al."3D printing PEDOT-CMC-based high areal capacity electrodes for Li-ion batteries".IONICS 27.7(2021):2857-2865.